Re: [JSch-users] Need a ChannelSftp.realPath() API

[<ym...@jc...>]

Hi,

   +-From: "Oberhuber, Martin" <Mar...@wi...> --
   |_Date: Wed, 23 Jan 2008 23:07:38 +0100 _______________________
   |
   |It would be nice to also have that feature available for 
   |resolving the canonical path of files, which may be accessed
   |through a chain of symbolic links. For instance:
   |  /dir1/foo --> /dir2/foo --> bar --> baz.txt

Do you mean that 'baz.txt' is the canonical name of '/dir1/foo'?
What is the definition for the term 'canonical name'?

   |in this case, I'd like to get
   |  ChannelSftp chan = (ChannelSftp)session.openChannel("sftp");
   |  // prints "/dir2/foo"
   |  System.out.println(chan.readlink("/dir1/foo"); 
   |  // should print "/dir2/baz.txt"
   |  System.out.println(chan.realpath("/dir1/foo");
   |Without this additional API, the Sftp capability of realpath
   |can not be fully exploited and obtaining the canonical path
   |for a file may require followign multiple symbolic links,
   |thus requiring multiple server round trips.
   |Proposed API is
   |  String ChannelSftp.realpath(String aPath);

You can implement such a function by using 
  ChannelSftp#lstat(String aPath).
  ChannelSftp#readlink(String aPath).
can't you?


Sincerely,
--
Atsuhiko Yamanaka
JCraft,Inc.
1-14-20 HONCHO AOBA-KU,
SENDAI, MIYAGI 980-0014 Japan.
Tel +81-22-723-2150
    +1-415-578-3454
Fax +81-22-224-8773
Skype callto://jcraft/